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previewform.cpp Example File
tools/codecs/previewform.cpp

/****************************************************************************
**
** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** Licensees holding valid Qt Preview licenses may use this file in
** accordance with the Qt Preview License Agreement provided with the
** Software.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include <QtGui>

#include "previewform.h"

PreviewForm::PreviewForm(QWidget *parent)
    : QDialog(parent)
{
    encodingComboBox = new QComboBox;

    encodingLabel = new QLabel(tr("&Encoding:"));
    encodingLabel->setBuddy(encodingComboBox);

    textEdit = new QTextEdit;
    textEdit->setLineWrapMode(QTextEdit::NoWrap);
    textEdit->setReadOnly(true);

    buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
                                    | QDialogButtonBox::Cancel);

    connect(encodingComboBox, SIGNAL(activated(int)),
            this, SLOT(updateTextEdit()));
    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

    QGridLayout *mainLayout = new QGridLayout;
    mainLayout->addWidget(encodingLabel, 0, 0);
    mainLayout->addWidget(encodingComboBox, 0, 1);
    mainLayout->addWidget(textEdit, 1, 0, 1, 2);
    mainLayout->addWidget(buttonBox, 2, 0, 1, 2);
    setLayout(mainLayout);

    setWindowTitle(tr("Choose Encoding"));
    resize(400, 300);
}

void PreviewForm::setCodecList(const QList<QTextCodec *> &list)
{
    encodingComboBox->clear();
    foreach (QTextCodec *codec, list)
        encodingComboBox->addItem(codec->name(), codec->mibEnum());
}

void PreviewForm::setEncodedData(const QByteArray &data)
{
    encodedData = data;
    updateTextEdit();
}

void PreviewForm::updateTextEdit()
{
    int mib = encodingComboBox->itemData(
                      encodingComboBox->currentIndex()).toInt();
    QTextCodec *codec = QTextCodec::codecForMib(mib);

    QTextStream in(&encodedData);
    in.setAutoDetectUnicode(false);
    in.setCodec(codec);
    decodedStr = in.readAll();

    textEdit->setPlainText(decodedStr);
}


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Qt 4.2.0-rc1